Electric field - Revision history

Daveed at 06:08, 23 November 2016

2016-11-23T06:08:22Z

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	The electric field is a region around a charged particle or object within which a force would be exerted on other objects.		The electric field is a region around a charged particle or object within which a force would be exerted on other objects.
	If we put a charged particle at a location and it experiences a force, it would be logical to assume that there is something present that		If we put a charged particle at a location and it experiences a force, it would be logical to assume that there is something present that
	is interacting with the particle. This "virtual force" is in essence the electric field.		is interacting with the particle. This "virtual force" is, in essence, the electric field.
	===A Mathematical Model===		===A Mathematical Model===

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	You can also visualize the electric field lines using a simulator[http://www.flashphysics.org/electricField.html].		You can also visualize the electric field lines using a simulator[http://www.flashphysics.org/electricField.html].

			The net electric field at a location in space is the vector sum of the individual contributions from all the sources of electric field in that space. This uses the principle of superposition.
			Electric field is a expressed as a vector that tends towards negative charges and away from positive.

			==Coulomb and NonCoulomb Electric Fields==

			Commonly this topic refers to Coulomb Electric fields, which are produced from superposing individual radial fields from charges and explicitly defined regions of electric field. There exists a second kind called NonCoulomb electric fields that are produced from a varying magnetic field. These electric fields are similar to the pattern of magnetic field produced from a wire because they are both circular. NonCoulomb electric fields (<math>E_{NC}</math>) follow the curled right-hand-rule with the thumb pointing in the direction of <math> \frac{-dB}{dt} </math> and the fingers curl along the direction of <math>E_{NC}</math>.

	==Examples==		==Examples==
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	[[File:Simple111.png]]		[[File:Simple111.png]]

	~~[[File:BarMagnetEfield.png]]~~

	It's easy to see that the electric field is pointing toward the negatively charged particle. The electric field is tending		It's easy to see that the electric field is pointing toward the negatively charged particle. The electric field is tending
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	D) The charges exert forces on each other equal in magnitude and pointing in the same direction.		D) The charges exert forces on each other equal in magnitude and pointing in the same direction.

	The answer is ~~of course~~ C, which can be reasoned even by an extension of Newton's Third Law. Using the simple equation in this page, it is also possible to derive and reason this result. Notice that the forces are opposite in direction! The equations above relate vectors, an important concept on ~~physics~~.		The answer is C, which can be reasoned even by an extension of Newton's Third Law. Using the simple equation in this page, it is also possible to derive and reason this result. Notice that the forces are opposite in direction! The equations above relate vectors, an important concept in physics.
			Note: Just because the forces are equal does not mean that the accelerations, velocities, or motions of the charges are equal; these depend on both the initial velocities and the masses of both charges.


	===Difficult===		===Difficult===
	The number of electric field lines passing through a unit cross sectional area is indicative of:		The number of electric field lines passing through a unit cross-sectional area is indicative of:

	A)field direction		A)field direction
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	E)rate of energy transfer		E)rate of energy transfer

	The answer is C, since the number of electric field lines through area is how field strength can be qualitatively and quantitatively determined.		The answer is C since the number of electric field lines through an area is how field strength can be qualitatively and quantitatively determined. Field lines come out of positive charges and go into negative charges.
			Field strength can be inferred by placing a charge with known electric and mass properties and measuring the force exerted. In the absence of other external forces, this exerted force is a product of the charge and the electric field at that location.

	==Connectedness==		==Connectedness==

	The electric field is made up. It's a lie. It's a concept that an English intellectual by the name of Michael Faraday made up centuries ago to think about the universe in a different way. But it this concept that is Faraday's greatest gift to the world. The electric field allows us to think about point charges, charge distributions, and current. It allows us to better understand electricity, a concept that would go on to spur some of the greatest inventions of the entire history of humankind. And now, with advances in areas like quantum computing and bioengineering where circuits are regularly employed to push the boundaries of science and engineering, we have Michael Faraday to thank. Devices that save lives or improve their quality, such as neuroprosthetics or pacemakers, rely on the principles theorized by Faraday long ago.		The electric field is made up. It's a lie. It's a concept that an English intellectual by the name of Michael Faraday made up centuries ago to think about the universe in a different way. But it this concept that is Faraday's greatest gift to the world. The electric field allows us to think about point charges, charge distributions, and current. It allows us to better understand electricity, a concept that would go on to spur some of the greatest inventions of the entire history of humankind. And now, with advances in areas like quantum computing and bioengineering where circuits are regularly employed to push the boundaries of science and engineering, we have Michael Faraday to thank. Devices that save lives or improve their quality, such as neuroprosthetics or pacemakers, rely on the principles theorized by Faraday long ago. Electric field is a useful visualization of a complex reality composed of interacting waves and interactions. The method of describing electric fields with vectors allowed for the Maxwell Equations to be derived, which drastically improved our understanding of electricity, magnetism, and how they are related.


	==History==		==History==

	It was in 1831 that Hans Christian Oersted demonstrated that by applying electric current through a wire, a magnetic field could be produced. How was this verified? The needle from a nearby compass was deflected accordingly. Michael Faraday would go on to demonstrate electromagnetic induction, in which Faraday resolved the issue of whether magnetism could produce electricity (which it could, if the magnetic effect was set in motion, creating a resulting current). But it was not until 1864 that a Scottish physicist by the name of James Clerk Maxwell came along to provide a unifying statement for electromagnetism by way of his groundbreaking publication 'Dynamical Theory of the Electric Field'. Maxwell's equations were a set of four equations that expressed, mathematically, the behaviors in which electric and magnetic fields participated.		It was in 1831 that Hans Christian Oersted demonstrated that by applying an electric current through a wire, a magnetic field could be produced. How was this verified? The needle from a nearby compass was deflected accordingly. Michael Faraday would go on to demonstrate electromagnetic induction, in which Faraday resolved the issue of whether magnetism could produce electricity (which it could if the magnetic effect was set in motion, creating a resulting current). But it was not until 1864 that a Scottish physicist by the name of James Clerk Maxwell came along to provide a unifying statement for electromagnetism by way of his groundbreaking publication 'Dynamical Theory of the Electric Field'. Maxwell's equations were a set of four equations that expressed, mathematically, the behaviors in which electric and magnetic fields participated.

	== See also ==		== See also ==

Daveed at 04:21, 23 November 2016

2016-11-23T04:21:14Z

← Older revision		Revision as of 00:21, 23 November 2016
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	[[File:Simple111.png]]		[[File:Simple111.png]]

			[[File:BarMagnetEfield.png]]

	It's easy to see that the electric field is pointing toward the negatively charged particle. The electric field is tending		It's easy to see that the electric field is pointing toward the negatively charged particle. The electric field is tending

Daveed at 18:01, 18 November 2016

2016-11-18T18:01:09Z

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	====Electric field====		====Electric field====

			Claimed by David Gamero (Fall 2016)
	<div class="mw-collapsible-content">		<div class="mw-collapsible-content">
	~~Claimed by David Gamero (Fall 2016)~~

	The electric field created by a charge is present throughout space at all times, whether or not there is another charge around to feel its effects. The electric field created by a charge penetrates through matter. The field permeates the neighboring space, biding its time until it can affect anything brought into its space of interaction.		The electric field created by a charge is present throughout space at all times, whether or not there is another charge around to feel its effects. The electric field created by a charge penetrates through matter. The field permeates the neighboring space, biding its time until it can affect anything brought into its space of interaction.

Daveed at 18:00, 18 November 2016

2016-11-18T18:00:55Z

← Older revision		Revision as of 14:00, 18 November 2016
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	====Electric field====		====Electric field====
	<div class="mw-collapsible-content">		<div class="mw-collapsible-content">
			Claimed by David Gamero (Fall 2016)

	The electric field created by a charge is present throughout space at all times, whether or not there is another charge around to feel its effects. The electric field created by a charge penetrates through matter. The field permeates the neighboring space, biding its time until it can affect anything brought into its space of interaction.		The electric field created by a charge is present throughout space at all times, whether or not there is another charge around to feel its effects. The electric field created by a charge penetrates through matter. The field permeates the neighboring space, biding its time until it can affect anything brought into its space of interaction.

Dchakraborty7 at 17:17, 17 April 2016

2016-04-17T17:17:53Z

← Older revision		Revision as of 13:17, 17 April 2016
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	field.		field.

			You can also visualize the electric field lines using a simulator[http://www.flashphysics.org/electricField.html].

	==Examples==		==Examples==

Dchakraborty7 at 17:13, 17 April 2016

2016-04-17T17:13:49Z

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	http://www.rare-earth-magnets.com/history-of-magnetism-and-electricity		http://www.rare-earth-magnets.com/history-of-magnetism-and-electricity

	~~Sherwood, Bruce A. "2.1 The Momentum Principle." Matter & Interactions. By Ruth W. Chabay. 4th ed. Vol. 1. N.p.~~: ~~John Wiley & Sons, 2015. 45-50. Print~~. ~~Modern Mechanics~~.		https://en.wikipedia.org/wiki/Electric_field

Dchakraborty7 at 17:13, 17 April 2016

2016-04-17T17:13:02Z

← Older revision		Revision as of 13:13, 17 April 2016
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	Electric Field Simulator [http://www.flashphysics.org/electricField.html]		Electric Field Simulator [http://www.flashphysics.org/electricField.html]

			==References==

			The following references were used while writing this page:

			http://www.rare-earth-magnets.com/history-of-magnetism-and-electricity

			Sherwood, Bruce A. "2.1 The Momentum Principle." Matter & Interactions. By Ruth W. Chabay. 4th ed. Vol. 1. N.p.: John Wiley & Sons, 2015. 45-50. Print. Modern Mechanics.

Dchakraborty7: /* External links */

2016-04-17T17:11:02Z

External links

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	===External links===		===External links===
	Interactive Electric Field [https://phet.colorado.edu/sims/charges-and-fields/charges-and-fields_en.html]		Interactive Electric Field [https://phet.colorado.edu/sims/charges-and-fields/charges-and-fields_en.html]

			Electric Field Simulator [http://www.flashphysics.org/electricField.html]

Dchakraborty7 at 17:09, 17 April 2016

2016-04-17T17:09:09Z

← Older revision		Revision as of 13:09, 17 April 2016
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	It was in 1831 that Hans Christian Oersted demonstrated that by applying electric current through a wire, a magnetic field could be produced. How was this verified? The needle from a nearby compass was deflected accordingly. Michael Faraday would go on to demonstrate electromagnetic induction, in which Faraday resolved the issue of whether magnetism could produce electricity (which it could, if the magnetic effect was set in motion, creating a resulting current). But it was not until 1864 that a Scottish physicist by the name of James Clerk Maxwell came along to provide a unifying statement for electromagnetism by way of his groundbreaking publication 'Dynamical Theory of the Electric Field'. Maxwell's equations were a set of four equations that expressed, mathematically, the behaviors in which electric and magnetic fields participated.		It was in 1831 that Hans Christian Oersted demonstrated that by applying electric current through a wire, a magnetic field could be produced. How was this verified? The needle from a nearby compass was deflected accordingly. Michael Faraday would go on to demonstrate electromagnetic induction, in which Faraday resolved the issue of whether magnetism could produce electricity (which it could, if the magnetic effect was set in motion, creating a resulting current). But it was not until 1864 that a Scottish physicist by the name of James Clerk Maxwell came along to provide a unifying statement for electromagnetism by way of his groundbreaking publication 'Dynamical Theory of the Electric Field'. Maxwell's equations were a set of four equations that expressed, mathematically, the behaviors in which electric and magnetic fields participated.

			== See also ==

			===External links===
			Interactive Electric Field [https://phet.colorado.edu/sims/charges-and-fields/charges-and-fields_en.html]

Dchakraborty7: /* History */

2016-04-17T17:05:42Z

History

← Older revision		Revision as of 13:05, 17 April 2016
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	==History==		==History==

	~~While Galileo is the one credited with the idea of inertia motion~~, it was ~~René Descartes,~~ a ~~French philosopher, who~~ would ~~expand upon Galileo's ideas. Descartes went~~ on to ~~propose three fundamental laws of nature~~ in ~~his book, ''Principles of Philosophy'',~~ the ~~first~~ of which ~~stated that "each thing~~, ~~as far as is~~ in ~~its power~~, ~~always remains in the same state; and~~ that ~~consequently, when it is once moved, it always continues to move." Thus, while~~ the ~~concept~~ of ~~inertia is often referred~~ to ~~as Newton's First Law, it was first described~~ by ~~Galileo and then perfected by Descartes decades before Newton published his findings.~~		It was in 1831 that Hans Christian Oersted demonstrated that by applying electric current through a wire, a magnetic field could be produced. How was this verified? The needle from a nearby compass was deflected accordingly. Michael Faraday would go on to demonstrate electromagnetic induction, in which Faraday resolved the issue of whether magnetism could produce electricity (which it could, if the magnetic effect was set in motion, creating a resulting current). But it was not until 1864 that a Scottish physicist by the name of James Clerk Maxwell came along to provide a unifying statement for electromagnetism by way of his groundbreaking publication 'Dynamical Theory of the Electric Field'. Maxwell's equations were a set of four equations that expressed, mathematically, the behaviors in which electric and magnetic fields participated.

	~~As for Newton, he first described~~ his ~~three laws of motion in~~ '~~'The Mathematical Principle~~ of ~~Natural Philosophy'~~'~~, for the Principia, which was published in 1687~~. ~~These laws described the relationship between an object and the forces acting upon it and laid the foundation for classical mechanics. While Newton~~'s ~~first law came from the work~~ of ~~Descartes and Galileo~~, ~~his other laws are~~ the ~~work of himself~~.